Peningkatan Kemampuan Berfikir Kritis Matematika Melalui Model Problem Based Learning Pada Siswa Kelas III SD Negeri 2 Culik. JPPD [Internet]. 2026 Oct. 27 [cited 2026 Oct. 27];3(02):207-20. Available from: https://journal.lumiverapublishing.org/index.php/jppd/article/view/490